Motion Control Engineering Nidec iControl

4-55
Safety Tests
iControl AC
4
The following illustration shows the car reaction to overspeed conditions at Normal and Emer-
gency Terminal switches in the down direction.
Figure 4.7 Emergency and Normal Terminal Overspeed Reaction
Speed
Hoistway
Level/Overspeed 1 Emergency Slowdown
Car
Overspeed 1
95% of contract speed
Overspeed 2
Car trips Emergency Switch
Car trips Terminal Switch
Contract speed
Emergency Terminal Switch
Normal Terminal Switch
Normal Stop
Normal Deceleration Parameter
Matching Learned Speeds
Level/Overspeed 2 Emergency Stop
Over 95% of Contract Speed E Stop
Over 95% of Contract Speed E Stop
Over 95% of Contract Speed E Stop
95% of Contract Speed: Hard-coded value for Emergency Terminal Switch
Level 1 Overspeed threshold: Learned speed value at switch plus the Limit
One Margin (set on the iView Safety Screen)
Level 2 Overspeed threshold: 105% of Level 1 Overspeed.
Speed Definitions